Cefpirome Sulfate Solubilized is a mixture of Cefpirome Sulfate with anhydrous sodium carbonate that is used to stabilize the pH in aqueous solution. Cefpirome Sulfate is a semisynthetic, broad-spectrum, fourth generation cephalosporin antibiotic that inhibits bacterial cell wall synthesis, and is resistant to β-lactamases. Cefpirome Sulfate is susceptible to degradation in aqueous solutions and optimal stability is pH 4-6. Cefpirome Sulfate Solubilized is soluble in water.